Results 31 to 40 of about 38,960 (281)

Repetitive Acoustic Streaming Patterns in Sinusoidal Shaped Microchannels

open access: yesArchives of Acoustics, 2020
Geometry of the fluid container plays a key role in the shape of acoustic streaming patterns. Inadvertent vortices can be troublesome in some cases, but if treated properly, the problem turns into a very useful parameter in acoustic tweezing or ...
Elnaz JANNESAR, Hossein HAMZEHPOUR
doaj   +1 more source

Characterization of Acoustic Streaming in Gradients of Density and Compressibility [PDF]

open access: yes, 2018
Suppression of boundary-driven Rayleigh streaming has recently been demonstrated for fluids of spatial inhomogeneity in density and compressibility owing to the competition between the boundary-layer-induced streaming stress and the inhomogeneity-induced
Augustsson, Per   +3 more
core   +2 more sources

Understanding the influence of ultrasonic streaming on solidification of AZ80 magnesium alloy during direct-chill casting using a transient coupling modeling

open access: yesJournal of Materials Research and Technology, 2021
In this modeling, the influence of ultrasonic streaming on physical fields during direct-chill (DC) casting of AZ80 magnesium alloy is investigated by a transient 2D axisymmetric mathematical model, which couples the ultrasonic field, fluid flow and ...
Xingrui Chen   +3 more
doaj   +1 more source

Fast acoustic streaming in standing waves : Generation of an additional outer streaming cell [PDF]

open access: yes, 2013
Rayleigh streaming in a cylindrical acoustic standing waveguide is studied both experimentally and numerically for nonlinear Reynolds numbers from 1 to 30.
Catherine Weisman   +7 more
core   +6 more sources

Velocities of acoustic streaming in a solid-liquid mixture generated by an ultrasonic wave (Particles and particle concentration)

open access: yesJournal of Fluid Science and Technology, 2014
Progressive ultrasonic waves cause acoustic streaming in a liquid. Although theoretical and experimental studies on acoustic streaming for liquid phase have been carried out, acoustic streaming for a solid-liquid mixture does not seem to have been ...
Junichi OHTA   +2 more
doaj   +1 more source

Numerical Study of Baroclinic Acoustic Streaming Phenomenon for Various Flow Parameters

open access: yesEnergies, 2022
The article presents a numerical study of the large-amplitude, acoustically-driven streaming flow for different frequencies of the acoustic wave and different temperature gradients between hot and cold surfaces.
Błażej Baran   +3 more
doaj   +1 more source

Frequency dependence of microflows upon acoustic interactions with fluids [PDF]

open access: yes, 2017
Rayleigh surface acoustic waves (SAWs), generated on piezoelectric substrates, can interact with liquids to generate fast streaming flows. Although studied extensively, mainly phenomenologically, the effect of the SAW frequency on streaming in fluids in ...
Cooper, Jonathan M.   +4 more
core   +2 more sources

Theoretical and experimental characterizations of gigahertz acoustic streaming in microscale fluids

open access: yesNanotechnology and Precision Engineering, 2019
Even as gigahertz (GHz) acoustic streaming has developed into a multi-functional platform technology for biochemical applications, including ultrafast microfluidic mixing, microparticle operations, and cellar or vesicle surgery, its theoretical ...
Weiwei Cui   +4 more
doaj   +1 more source

Frequency effect on streaming phenomenon induced by Rayleigh surface acoustic wave in microdroplets [PDF]

open access: yes, 2012
Acoustic streaming of ink particles inside a water microdroplet generated by a surface acoustic wave(SAW) has been studied numerically using a finite volume numerical method and these results have been verified using experimental measurements. Effects of
Alghane, Mansour   +5 more
core   +1 more source

Continuous Particle Aggregation and Separation in Acoustofluidic Microchannels Driven by Standing Lamb Waves

open access: yesMicromachines, 2022
In this study, we realize acoustic aggregation and separation of microparticles in fluid channels driven by standing Lamb waves of a 300-μm-thick double-side polished lithium-niobate (LiNbO3) plate.
Jin-Chen Hsu, Chih-Yu Chang
doaj   +1 more source

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